Thermoelectric power studies of zinc-substituted nickel ferrites

Thermoelectric power studies of zinc-substituted nickel ferrites have been investigated as a function of composition and temperature. On the basis of the sign of the Seebeck coefficient (S), the ferrites under investigation h ave been classified as n-type and p-type semiconductors. The values of char ge carrier concentration have also been computed from the observed values o f Seebeck coefficient. The variation of thermoelectric power and charge car rier concentration has been discussed as a function of composition and temp erature. On the basis of these results, an explanation for the conduction m echanism in these ferrites is suggested. (C) 2000 Elsevier Science B.V. All rights reserved.